XXE in Mitre Caldera
CVE-2021-42560
An issue was discovered in CALDERA 2.9.0. The Debrief plugin receives base64 encoded "SVG" parameters when generating a PDF document. These SVG documents are parsed in an unsafe manner and can be leveraged for XXE attacks (e.g., File Exfiltration, Server Side Request Forgery, Out of Band Exfiltration, etc.).
Vulnerability class: XXE (XML External Entity)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.021 (81.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 81.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.021 · newest: 0.021 · change: 0.000
Affected products
- Mitre Caldera — versions 2.9.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/mitre/caldera/releases (Third Party Advisory, Release Notes)
- github.com/DrunkenShells/Disclosures/tree/master/CVE-2021-42560-Unsafe XML Pars… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-42560?
- CVE-2021-42560 is a high-severity vulnerability in Mitre Caldera, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 8.8/10. Published 2022-01-12.
- How severe is CVE-2021-42560?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-42560 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.